Eye On OSGiJames Governor RedMonk @monkchips

Themes• How did we get here• Java: Fear of Forking• OSGi Trends, Directions and Opportunities

How Did We Get Here?• Object Orientation• Component-based development• Smalltalk, of course• The eternal question of reuse –

what’s the ideal granularity for a bundle/service/component?

• Java – fear of forking

Java: Fear of The Fork• Massively successful• One Big Hairball, or three?

• Yet modularity was an afterthought

Java Centres Of Gravity• the ASF• the Eclipse Foundation• Google• IBM• Oracle• OSGi• VMware Springsource

Unforkable Software? • Oracle – OSGi in WebLogic, Glassfish• Java Community Process?• LibreOffice, ForgeRock, Illumos

Eclipse• Governance ++• Shared implementations• Shared specifications• Licensing matters• Consumability• Extensibility

Google <3 Java?• Android – Fragmentation – or diverse ecology?– Java on linux for mobile, promise realised– Real innovation– Cluttered API?– Dalvik and the case against

• GWT• Instantiations – Google as an IDE provider• Summer of Code

IBM: A Disturbance In The Force• WebSphere refocusing on technology, developers,

leading the OSGI charge

• See Expeditor

SpringSource

“For the first time in 10 years, I have no desire to go to JavaOne, or whatever's left of it.”

Rod Johnson, CEO SpringSource

• Spring made JEE less painful • SpringDM for OSGi, dm Server• Groovy• RabbitMQ• VMware and EMC

OSGi in middleware• Apache Aries, Sling• Day Software• Eclipse BIRT• Progress Software/ServiceMix• Oracle Glassfish• WS02 Carbon

Who are you calling a Lightweight?• WebSphere, Jboss, Glassfish, Tomcat… Jetty• Lightweight architectures offer raw performance

Rise of the (Virtual) Machines• language diversity• Performance – VM performance improvements

The Rise and Rise of Social Coding• Agile• People write code, machines run code• Github– Linus does it again. Open Source is Social Networking.

• Celebrate the fork, but ensure resolution• Developers get the gist• Reuse doesn’t always mean a singleton

Ubuntu as Master Packager

• Investing in User Experience• Easy as apt-get• Making choices for the user

What About The REST of OSGi?• SOA became restful• Web refactoring• What would OSGi with a web refactoring look like?• Or – how can OSGi appeal to web-savvy developers?• Or – OSGi for humans

The Stackless Stack• Nothing is defined until it is

• Check out the Paremus Nimble shell/framework– video demo here.

The Gandhi Model Of Tech Adoption

“First they ignore you, then they ridicule you, then they fight you, then you win”

DOA

“OSGi is a great spec for vendors, but a terrible spec for developers. It inflicts a lot of pain.”

Ross Mason, CTO MuleSoft

Brains

Kick Like A Mule

“We’re modelling hot deployment on OSGi principles. If someone comes up with a way to make OSGi consumable by the masses we'll jump right on it.”

Ross Mason, CTO MuleSoft

Atlassian – another master packager• Atlassian plugin model - OSGi without the OSGi

• “OSGi has let us write big features in a portable, modular way across products, and has dramatically sped up the development process via its hot deployment capability. Along the way, we've had some issues, particularly with libraries that don't play well in modular environment, but they certainly haven't outweighed the benefit IMO; OSGi certainly does rock.” – Don Brown, CTO

Why Should Developers Care• Choose your own container• Find Code To Start Your Projects• Constraints can make life easier - Flow• Dependencies - OK When You Know What They Are• Runtimes Aren’t Locked into Frameworks

Why Should Managers Care• Running full stacks for all app dev is expensive• Fit for purpose runtimes• Define policies, drive adherence through tools• Performance• A standard to rely on• For embedded- minimum runtime to declare victory• OSGi as a forcing factor to encourage modularity.

Duke and Tux

Futures• OSGi pervasive– Automotive– Smart grids and home gateways – Phones– Automation (sensors and actuators)

• OSGi for desktop integration – Lotus + Cisco– Come on IBM, where’s the Expeditor developer play?

OSGi and the Cloud• Private clouds will be all about OSGi• Platform as a Service – who will deliver?

NoSQL• Apache SOLR• Cassandra• Hadoop• Riak• Tokyo Cabinet

The Really Big Challenge• Retooling Java legacy – a toolchain for modularity• There is no silverbullet• Migration services and “retrofitting”

Its all about the earbuds• The best packager wins• Users like constraints• Developers like constraints• Applications like constraints• Design matters

Thanks!

•Podium: http://www.flickr.com/photos/spine/2408993662/•Standing Over The Clouds http://www.flickr.com/photos/donabelandewen/470780785/

•1, 2, 3 Jump!: http://www.flickr.com/photos/cristeenq/

•Netbook: http://www.flickr.com/photos/ndevil/3349323242/•Giant hand: http://www.flickr.com/photos/76074333@N00/147857534/•Pylon; http://www.flickr.com/photos/imuttoo/2423929597/•Brown field: http://www.flickr.com/photos/brian-m/2812607097/